CN85104195A

CN85104195A - Heat exchanger

Info

Publication number: CN85104195A
Application number: CN85104195.7A
Authority: CN
Inventors: 比约恩·英格瓦·希勒斯特罗姆
Original assignee: ARMATURJONSSON AB
Current assignee: ARMATURJONSSON AB
Priority date: 1985-06-01
Filing date: 1985-06-01
Publication date: 1986-11-26
Also published as: CN1003390B

Abstract

A kind of heat exchanger, its composition comprise a housing (10), are furnished with the influent stream pipe (11) and the outflow tube (12) of first kind of heat transferring medium (M1) on it; Be contained at least one coil pipe (14) in the housing (10), have this parallel straight length (14 ') of several segment bases, and have and be used for carrying out the import (16) and the outlet (17) of second kind of medium (M2) of heat exchange with above-mentioned first kind of medium (M1).There is several piece to have the flow distribution plate (18) of spray orifice (19) in the housing (10), is installed in the place ahead of each straight length (14 '), and keep being not more than 10 times distance of injection diameter with each straight tube axis.

Description

Heat exchanger

Involved in the present invention is a kind of heat exchanger, and its composition comprises: a shell is provided with the import and the outlet of first kind of heat transferring medium above; Have a coil pipe at least, this pipe has several sections straight lengths that are parallel to each other basically, and is positioned near the back bending pipeline section two relative walls of shell, and is provided with above-mentioned first kind of medium and carries out the import and the outlet of second kind of medium of heat exchange.

The heat exchanger of most of forms all exists a common problem, is exactly the inhomogeneous of heat distribution.This uneven heat distributes and can be regarded as certain bypass effect, and promptly heat exchange surface is not utilized well.Purpose of the present invention, in order to provide a kind of novel heat exchanger, it has been eliminated just, in any case perhaps also be to have reduced this heat defective pockety considerablely.In addition, the present invention also aims to,, improve the heat exchange performance of heat exchanger significantly by arranging heat exchange surface rightly.

According to the present invention, the realization of above-mentioned purpose is that this strip has many spray orifices owing to adopted a kind of flow distribution plate, and the inner chamber cross-sectional area that is parallel to the coil pipe straight length of the size of plate and shell is suitable.Its installation site is by the flow direction of above-mentioned first kind of medium, in the front of each coil pipe straight length.

Suitable way is that some coil pipes are connected in parallel, in the housing of packing into.It is parallel to each other and close that straight length is partly wanted.What coil pipe adopted is the elliptic cross-section pipe.The long axis direction of its cross section should be parallel with flowing to of described first kind of medium during placement.

Below with reference to accompanying drawings the present invention is described in detail.These figure illustrate the face of land to show the situation of several embodiments of the present invention.Fig. 1 is the side partial sectional view of a kind of simple heat exchanger of design according to the present invention.Fig. 2 is outer cover of heat exchanger and the partial sectional view that is contained in the parts such as coil pipe in the shell.Fig. 3 is another vertical view through the embodiment of modification of the present invention, and this scheme has adopted the some heat(ing) coils that are connected in parallel.Fig. 4 is the partial view along IV among Fig. 3-the IV line is vertically cut open.Fig. 5 is another embodiment of the present invention.Fig. 6 amplifies situation about having shown when MEDIA FLOW is crossed heat exchanger.

Figure 1 shows that one embodiment of the invention, it comprises a long case shape shell, and each face is the plane substantially, but has some wrinkle on two end walls.The cross sectional shape of shell is rectangular, and shell top is sealed by the influent stream pipe 11 of first kind of medium M1, and the bottom is sealed by the outflow tube 12 of this medium.Boatswain chair 22 is housed on the influent stream pipe 11, and similar boatswain chair 23 also is housed on the outflow tube 12.Utilize this two boatswain chairs, just heat exchanger can be fixed.For example, be fixed on the wall or other foundation structure on.Influent stream pipe 11 has some larger-diameter holes 13 in its side towards enclosure interior.Medium M1 feeds by managing 11,13 enters shell 10 through the hole thus, as shown by arrows.In the one side of outflow tube 12, also have corresponding hole towards shell 10 inside.Medium leaves heat exchanger through outflow tube 12, and also as shown by arrows, the right part of influent stream pipe 11 and outflow tube 12 all has been shrunk to thinner caliber.Devices such as constant temperature regulator, or vent valve can be installed in end at these tubules.For the pipe of bottom, can also drain valve be installed at this.

Coil pipe 14 is fixed together with shell 10.This coil pipe is made up of a coiled pipe.For example, can adopt with ribbing copper pipe to make.Just as shown in FIG., coil pipe has plurality of sections straight length 14 ", " connect together by return bend 14 between each section straight tube.Some inclination slightly when two straight lengths that are connected in same return bend leave return bend and extend, as shown in FIG..But also can stretch abreast, for example promptly be this kind situation among Fig. 5.Above-mentioned straight length also can be only parallel on direction substantially, and respectively have the sine curve sigmoid of one's own.Back bending pipeline section 14 " places in the projection 15 on the corrugated outer wall of shell.In order to form the inclination of above-mentioned straight length, these projections 15 should have the skew of a little toward each other.Second kind of medium M2 feeds in the coil pipe by going into head piece 16, and leaves through going out head piece 17, as shown by arrows.Upward drawn as figure, the diameter of coil pipe is wanted little many compared with connector 16 and 17.Therefore, these two interfaces all have one section reducing pipe.Heat exchanger as described herein is to move according to reverse-flow operation principle.

Flow through with regard to the flow direction of shell 10 with regard to medium M1, the updrift side of each of coil pipe section straight length all is equipped with a flow distribution plate 18.According to Fig. 1, these plates alternately are fixed on the two relative ripple walls of shell.Fixing point is positioned at the inboard of each trough.Then, whole plate extends through back bending place of shell 10 through coil pipes.At this place, the end of plate has all been reserved one section space or has been opened a hole when design, so that allow the back bending pipeline section therefrom pass.The size of flow distribution plate can cover the cross-sectional area of whole casing basically, as shown in Figure 3.Represented a kind of method among this figure, be about on the flow distribution plate several and protrude in the opening that edge 20 insert on shell walls, plate has been fixed among the housing with this.Still as shown in Figure 3, have a large amount of spray orifice 19 on the flow distribution plate, its shape can be a circle drawn among the figure, also can be long, or other any suitable cross sectional shape.Here, it is essential flow distribution plate and make distance between the cross section along the straight length central axis.This distance is comparatively suitable to be not more than 10 times of injection diameter.

Heat exchanger described above, its working method is as follows:

Second medium M1 and M2 that desire is carried out heat exchange betwixt, its runner is connected to inflow pipe 11 and outflow tube 12, and goes into head piece 16 and go out head piece 17.So, medium M2 flow through pipe 14 and medium M1 by pipe 11 by perforate 13 inflow enclosure interior, by uniform distribution on the whole width of housing, as shown in fig. 1.When medium M1 tap hole 13, run into first flow distribution plate 18, have a large amount of spray orifice 19 on it.The form of the following scattering stream of this medium is from spray orifice 19 ejections.Since flow distribution plate to the tube hub axis spacing of straight length from being not more than about 10 times of injection diameter, so the medium that sprays just with this straight length " encirclement " get up.This point is very superior, and it makes heat transfer process reach optimum state.Pitch-row size between the spray orifice 19 just makes one strand medium jet that the sprays mixing that crosses each other on the top boundary surface of coil pipe straight section from the hole.When medium M1 by behind the 1st layer of straight length, can meet next piece flow distribution plate 18 again, its design form and mounting means and first are identical, thereby MEDIA FLOW are allocated in down again on neighbour's the straight length.The rest may be inferred for all the other.Among Fig. 1, the 12 sections straight lengths that have flow distribution plate that drawn, each section pipe 14 ' the top all have row's spray orifice 19.

Heat exchanger shown in Figure 1 has only a coil pipe 14, and this is enough in the ordinary course of things.But, when the big exchange capability of heat of needs, also can adopt the method as shown in Fig. 3 and Fig. 4, many coil pipes are connected in parallel.During installation, the straight length of these pipes is parallel to each other and close mutually, and as described above in the embodiment like that, the corresponding spray orifice 19(of the row's of leaving number and number of tubes sees Fig. 3 on flow distribution plate), and these spray orifices are aimed at each straight length.Stretch out right angle flange 20 on the long limit of plate 18.This flange is packed in the hole that matches with it on the planomural face of shell 10, with this flow distribution plate is fixed in the housing 10.Flange 20 can be shut in the hole with any one method, for example uses soft soldering, and is bonding, or melting welding etc.Owing to have fin on the pipe, Suo Yi And is associated in and will reserves enough gaps between together the adjacent pipe and allow flow media M1 pass through.Situation when medium M1 flows through the heat exchanger that has several parallel coil pipes 14 at length is depicted among Fig. 6.

As previously mentioned, in two embodiments in front, the planar side of long limits of flow distribution plate 18 and shell is close to together, and minor face one of alternately extends in two end walls to be located.As shown in Figure 3, there is a certain gap location the inboard that always extends to apart from coil pipe back bending place of plate.This structure Design thought is such: after pipe 14 is heated, back bending section 14 " the outside will outwards expand, extend through the space of reserving originally and tightly withstand on the inboard of housing wrinkle part 15.Its result, original among the medium M1 15 dirty that part of fluids will be hindered and can not be continued dirty at this contact point along the position.So this part medium will be forced to find a way out in addition, walk around pipe and the space passed between flow distribution plate 18 ends and the back bending inboard flows down.This walks around the fluid passage of back bending pipeline section, is feasible in many cases, or even desired.Yet, also need sometimes the straight length 14 of each layer ' separate fully with flow distribution plate 18.In Fig. 5, this point is by allowing coil pipe 14 pass outside the housing 10 near back bending place, and with back bending 14 " places and realizes outside the housing.When adopting this way, flow distribution plate 18 can all connect together whole outer perimeter with the inwall of housing 10, form the periphery of sealing.Certainly also need to refill outside the housing 10 to establish one deck shell, although do not reflect this point among Fig. 5.

Claims

1, heat exchanger.Form by following part: housing (10).Which is provided with the influent stream pipe (11) and the outflow tube (12) of first kind of heat transferring medium (M1); At least one coil pipe (14).Have several sections straight lengths (14 ') parallel to each other basically and be positioned near two relative walls of housing back bending section (14 "), and have be used for the same state first kind of medium (M1) carry out heat exchange second kind of medium (M2) import (16) and export (17); The characteristics of this heat exchanger are: along the flow direction of above-mentioned first kind of medium (M1).(flow distribution plate (18) all is equipped with in the place ahead of 14 "), has several spray orifices (19) on the plate, and the inner chamber of the size of plate and housing (10) is parallel to above-mentioned straight length (the cross-sectional area sizableness of 14 ") at each straight length.

2, heat exchanger as claimed in claim 1, its characteristics also comprise: the installation site of flow distribution plate (18) is in the place ahead of each straight length (14 ') axis, plate is not more than 10 times of injection diameter on the plate to the distance of this axis.

3, the heat exchanger described in claim 1 and 2, its characteristics also comprise: the distance that flow distribution plate (18) is gone up between each spray orifice (19) is to select like this, promptly make from each spray orifice ejection and to the medium jet of following straight length (14 ') direction diffusion, can cross with the medium jet of adjacent spray orifice ejection, intersection is roughly on the plane that boundary face became of straight length (14 ') facing to spray orifice.

4, the heat exchanger described in claim 1,2 or 3, its characteristics also comprise: several coil pipes (14) are connected in parallel, and are contained in the housing, and the straight length of each bar coil pipe (14 ') is close mutually, and keeping parallelism.

5, the heat exchanger described in claim 1,2,3 or 4, its characteristics also comprise: (14 ") can place outside the shell wall side back bending section of coil pipe (14).

6, as the described heat exchanger of above-mentioned each claim, its characteristics also comprise: by the coil pipe (14) that the oval cross section pipe that has fin is made, its cross section long axis of ellipse direction parallels with the flow direction of above-mentioned first kind of medium (M1) when mounted.